U.S. patent application number 15/357538 was filed with the patent office on 2017-10-05 for quick take-down firearm.
The applicant listed for this patent is Michael Lance Maffett. Invention is credited to Michael Lance Maffett.
Application Number | 20170284760 15/357538 |
Document ID | / |
Family ID | 59959234 |
Filed Date | 2017-10-05 |
United States Patent
Application |
20170284760 |
Kind Code |
A1 |
Maffett; Michael Lance |
October 5, 2017 |
Quick Take-Down Firearm
Abstract
Quick take-down firearms and methods of using quick-take down
firearms. The quick-take down includes an upper receiver coupling
and a barrel coupling. The quick take-down can be unlocked by
sliding a sliding lock collar in a translational motion to an
unlocked position to release locking elements from a locked
configuration. In the unlocked position, a barrel and handguard may
be installed onto and removed from the upper receiver of the
firearm. Releasing the sliding lock collar returns it to a locked
position, securing the barrel and handguard to the upper
receiver.
Inventors: |
Maffett; Michael Lance;
(Rome, GA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Maffett; Michael Lance |
Rome |
GA |
US |
|
|
Family ID: |
59959234 |
Appl. No.: |
15/357538 |
Filed: |
November 21, 2016 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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62314758 |
Mar 29, 2016 |
|
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|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F41A 21/484 20130101;
F41A 3/66 20130101; F41A 21/485 20130101; F41A 5/26 20130101; F41A
21/48 20130101 |
International
Class: |
F41A 21/48 20060101
F41A021/48; F41A 5/26 20060101 F41A005/26; F41A 3/66 20060101
F41A003/66 |
Claims
1. A method of assembly for a quick take-down firearm, the method
comprising: (a) sliding a sliding lock collar in a translational
motion to an unlocked position to release a plurality of locking
elements from a locked configuration, wherein the sliding lock
collar is biased away from the unlocked position towards a locked
position; (b) while the sliding lock collar is held at the unlocked
position, inserting a barrel of the firearm into an upper receiver
of the firearm, wherein: i. an upper receiver coupling is secured
to threading of the upper receiver, the upper receiver coupling
comprising a gas tube tunnel extending through a body of the upper
receiver coupling; ii. the barrel includes a barrel coupling; and
iii. inserting the barrel into the upper receiver further comprises
inserting a barrel pin of the barrel into a notch of the upper
receiver threading, and inserting a gas tube of the barrel through
the gas tube tunnel of the upper receiver coupling; (c) after
inserting the barrel into the upper receiver, releasing the sliding
lock collar such that it slides in the translational motion to the
locked position to secure the upper receiver coupling to the barrel
coupling.
2. The method of claim 1, wherein the translational motion is a
non-rotational motion.
3. The method of claim 2, wherein inserting the gas tube comprises
inserting the gas tube through one of a plurality of spaced gas
tube tunnels extending through the upper receiver coupling.
4. The method of claim 3, wherein the plurality of spaced gas tube
tunnels are rotationally spaced apart from one another.
5. The method of claim 4, wherein the plurality of spaced gas tube
tunnels are rotationally offset from the plurality of locking
elements.
6. The method of claim 2, wherein releasing the plurality of
locking elements comprises releasing the plurality of locking
elements from engagement with a plurality of separate locking
element receivers.
7. The method of claim 6, wherein the plurality of separate locking
element receivers comprise spaced apart depressions in the barrel
coupling.
8. The method of claim 7, wherein the barrel coupling abuts a
barrel ridge of the barrel.
9. The method of claim 8, wherein the barrel coupling further
comprises threading engaged with threading of a handguard of the
firearm.
10. The method of claim 8, wherein, when the upper receiver
coupling is secured to the barrel coupling, the barrel ridge of the
barrel abuts a reference surface on the upper receiver.
11. The method of claim 1, further comprising, prior to inserting
the barrel into the receiver, removing a protective covering from
the gas tube.
12. A quick take-down for a firearm, the quick take-down
comprising: (a) an upper receiver coupling configured to be secured
to an upper receiver threading of the firearm, the upper receiver
coupling comprising a plurality of rotationally offset gas tube
tunnels extending through the upper receiver coupling; (b) a barrel
of the firearm including a rifle barrel coupling; and (c) a sliding
lock collar configured to be slid in a translational motion between
a locked position and an unlocked position, the sliding lock collar
biased to the locked position, wherein when the sliding lock collar
is in the unlocked position the barrel of the firearm can be
removed from and installed on the upper receiver, wherein when the
sliding lock collar is in the locked position and the barrel is
installed on the upper receiver the upper receiver coupling is
secured to the rifle barrel coupling thereby securing the barrel to
the upper receiver.
13. The quick take-down component of claim 12, wherein the rifle
barrel coupling is further configured to be secured to a handguard
threading of a handguard of the firearm.
14. The quick-take down component of claim 12, wherein the
translational motion is a non-rotational motion.
15. The quick-take down component of claim 14, wherein the sliding
lock collar extends around and slides on the upper receiver
coupling.
16. The quick-take down component of claim 15, wherein, when the
sliding lock collar is in the locked position, the sliding lock
collar causes a plurality of separate locking elements of the upper
receiver coupling to be held in a locked configuration.
17. The quick-take down component of claim 16, wherein the separate
locking elements are rotationally offset relative to the plurality
of gas tube tunnels.
18. The quick-take down component of claim 16, wherein the rifle
barrel coupling comprises a plurality of separate locking element
receivers configured to receive portions of the locking elements
when the locking elements are in the locked configuration.
19. The quick-take down component of claim 16, wherein, when the
sliding lock collar is in the unlocked position, the locking
elements are released from the locked configuration.
20. The quick take-down component of claim 12, further comprising
anti-rotation features removably secured to and extending
rearwardly from the upper receiver coupling, the anti-rotation
features including stop surfaces configured to interact with
surfaces of the upper receiver to limit rotation of the upper
receiver coupling relative to the upper receiver threading.
21. The method of claim 1, wherein the barrel coupling is secured
to the barrel.
22. The quick take-down component of claim 12, wherein the rifle
barrel coupling is configured to be secured to the barrel of the
firearm.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This patent claims the benefit of and incorporates in its
entirety U.S. provisional patent application No. 62/314,758, filed
Mar. 29, 2016 for a "Straight-in, rifle barrel attachment &
detachment using a ball bearing positive lock."
BACKGROUND
[0002] AR-15, M4, M16 and similar prior art MILSPEC rifles cannot
be quickly disassembled and reassembled where the rifle barrel
connects to the upper receiver, a process which usually requires
the use of specialized tools and a work-bench equipped with a vise.
While there are some prior art systems that allow for in-field
tool-less disassembly and reassembly of the barrel from the upper
receiver, these systems are not effective or robust, are
complicated to use, and do not allow for use of standard MILSPEC
had guards and other accessories commoly used with these types of
firearms.
SUMMARY
[0003] This patent is for quick-take down firearms and methods of
using quick-take down firearms.
[0004] In one non-limiting example, the quick-take down includes an
upper receiver coupling configured to be secured to an upper
receiver threading of the firearm, the upper receiver coupling
including several rotationally offset gas tube tunnels extending
through the upper receiver coupling; further includes a rifle
barrel coupling configured to be secured to a barrel of the
firearm; and further includes a sliding lock collar configured to
be slid in a translational motion between a locked position and an
unlocked position, the sliding lock collar biased to the locked
position; when the sliding lock collar is in the unlocked position
the barrel of the firearm can be removed from and installed on the
upper receiver; when the sliding lock collar is in the locked
position and the barrel is installed on the upper receiver the
upper receiver coupling is secured to the rifle barrel coupling
thereby securing the barrel to the upper receiver.
[0005] In one non-limiting example, a method of assembly for a
quick take-down firearm includes: sliding a sliding lock collar in
a translational motion to an unlocked position to release a
plurality of locking elements from a locked configuration, in which
the sliding lock collar is biased away from the unlocked position
towards a locked position; next, while the sliding lock collar is
held at the unlocked position, inserting a barrel of the firearm
into an upper receiver of the firearm, in which an upper receiver
coupling is secured to threading of the upper receiver, the upper
receiver coupling comprising a gas tube tunnel extending through a
body of the upper receiver coupling and a barrel coupling is
secured to the barrel; next inserting the barrel into the upper
receiver further comprises inserting a barrel pin of the barrel
into a notch of the upper receiver threading, and inserting a gas
tube of the barrel through the gas tube tunnel of the upper
receiver coupling; and next, after inserting the barrel into the
upper receiver, releasing the sliding lock collar such that it
slides in the translational motion to the locked position to secure
the upper receiver coupling to the barrel coupling.
BRIEF DESCRIPTION OF DRAWINGS
[0006] FIG. 1 shows an example of a prior art firearm.
[0007] FIG. 2 shows the firearm of FIG. 1 with the barrel and
handguard disassembled from the upper receiver.
[0008] FIG. 3 shows the upper receiver of the firearm of FIG. 1 in
more detail.
[0009] FIGS. 4A-B show and end of the barrel of the firearm of FIG.
1 in more detail.
[0010] FIG. 5A schematically shows an example of a quick take-down
coupling installed on a firearm.
[0011] FIGS. 5B-E show end and cross-sectional views of the quick
take-down coupling of FIG. 5A.
[0012] FIG. 6 shows an example of an upper receiver coupling
component in a disassembled condition.
[0013] FIGS. 7A-D show an example of a body of an upper receiver
coupling component.
[0014] FIGS. 8A-C show an example of a sliding lock collar of an
upper receiver coupling component.
[0015] FIGS. 8E-D schematically show an example of an upper
receiver coupling component in unlocked and locked configurations
respectively.
[0016] FIGS. 9A-C show an example of a face plate of an upper
receiver coupling component.
[0017] FIGS. 10A-C show an example of a barrel coupling
component.
[0018] FIG. 11 schematically shows an example of a barrel coupling
component mounted on a barrel.
[0019] FIG. 12 schematically shows an example of a protective cap
for a gas tube and barrel end.
[0020] FIG. 13 shows an alternative upper receiver coupling
component.
DETAILED DESCRIPTION OF DRAWINGS
[0021] FIGS. 1 and 2 show a prior art firearm, which, in this
example, is an AR-15. The quick take-down couplings described in
this patent are not limited to use with AR-15's, however, and may
be used with a wide variety of firearms where it may be desirable
to be able to quickly take down and assemble a firearm. As
non-limiting examples, the quick take-down couplings of this patent
may also be used with M4's, M16's, and similar MILSPEC rifles.
[0022] The firearm of FIGS. 1 and 2 includes an upper receiver 10,
a barrel 12, and a handguard 14. FIG. 1 shows the firearm assembled
with the barrel 12 and handguard 14 attached to the upper receiver
10. FIG. 2 shows the firearm disassembled with the barrel 12 and
handguard 14 removed as a unit from the upper receiver 10.
[0023] FIG. 3 shows in more detail an example of a prior art upper
receiver 10. The upper receiver 10 includes an opening 16 for
receiving an end of the barrel 12, threads 18 surrounding the
opening 16, a notch 20 in the threads 18, and reference surface 22
(e.g. the shoulder where threading 18 ends). FIG. 3 also shows
another opening 24 in the upper receiver 10 for receiving a gas
tube or piston that facilitates cycling of the firearm (FIG. 2
shows a gas tube 26).
[0024] FIGS. 4a and 4b show in more detail an example of a prior
art barrel 12. The barrel 12 includes on its outer surface a
reference surface 28 (e.g. a ridge extending around the barrel) and
a pin 30.
[0025] In the prior art, the barrel 12 was attached to the upper
receiver 10 by inserting the end of the barrel 12 into the upper
receiver's opening 16 until the barrel reference surface 28
contacted the reference surface of the upper receiver 22 and the
pin 30 was fully seated in the notch 20. Next, a barrel nut (not
shown) would be threaded onto the threads 18 of the upper receiver
10 to secure the barrel 12 in the opening 16. A handguard (e.g.
such as handguard 14 shown in FIGS. 1 and 2) could be secured by
threading the handguard onto exterior threads of the barrel nut or
in other manners.
Quick Take-Down Coupling Example
[0026] FIGS. 5a-5e show an example of a quick take-down coupling
that can be used with the firearm of FIGS. 1-4 to provide quick and
easy installation and removal of the barrel from the upper
receiver. The quick take-down coupling of FIGS. 5a-e includes an
upper receiver coupling 32 and a barrel coupling 34. The upper
receiver coupling 32 secures to the threads 18 of the upper
receiver. The barrel coupling 34 secures to the barrel 12 proximate
the reference surface 28 and pin 30. The quick take-down coupling
has a locking mechanism, described in further detail below, for
locking and unlocking the upper receiver coupling 32 from the
barrel coupling 34, providing for quick and easy installation and
removal of the barrel 12 from the upper receiver 10. FIGS. 5a-5e
provide a general overview of the upper receiver coupling 32 and
barrel coupling 34 components, and do not show all of the
individual elements of those components.
[0027] FIGS. 6 through 9 show the upper receiver coupling 32 of
FIG. 5 in further detail. Referring to FIG. 6, the upper receiver
coupling 32 includes, from left to right, a body 36, locking
elements 38, resilient element 40, sliding lock collar 42, and face
plate 44. The resilient element 40 is shown in FIG. 6 as a coil
spring, although other types of resilient elements may be used,
such as a wave spring.
[0028] FIGS. 7A-D show the body 36 of FIG. 6 in further detail. The
body 36 includes an opening 46 extending through it from one end to
the other. At least a portion of the opening 46 includes interior
threading 48 (see FIG. 6) which is configured to engage the
exterior threading 18 of the upper receiver 10. In other words, the
pitch, thread angle, major diameter, minor diameter, etc. of the
threading 48 of the body 36 is configured to correspond with the
pitch, thread angle, major diameter, minor diameter, etc. of the
threading 18 of the upper receiver 10. In some embodiments, the
body threading 48 is MILSPEC or other standardized threading
allowing it to be installed on a wide variety of commercially
available firearms. The body 36 of FIGS. 7A-D also includes through
holes 50 around the perimeter of the body 36 for receiving set
screws or similar items to further secure the upper receiver
coupling 32 to the upper receiver threads 18. In some embodiments,
the set screws used may be nylon or another relatively soft
material to lessen the risk of damaging the upper receiver threads
18.
[0029] The body 36 of FIGS. 7A-D further includes apertures 52
spaced around the body 36 configured to receive locking elements 38
(e.g. ball bearings) such that portions of the locking elements may
protrude into the opening 46 of the body 36 when the upper receiver
coupling 32 is in a locked configuration (discussed further below).
As shown in FIG. 7D, the apertures taper so that, in cooperation
with the shape of the locking elements 38, the amount of
penetration of the locking elements 38 into the opening 46 is
limited.
[0030] The body 36 of FIGS. 7A-D further includes several tunnels
54 extending through the length of the body from one end to the
other. The tunnels 54 are configured to allow passage of a gas tube
or piston associated with the barrel 12 through the body 36 and
into the opening 24 on the upper receiver. As shown in FIGS. 7A-C,
the tunnels 54 are rotationally offset from one another (in this
example, there are four tunnels 54 spaced apart 90 degrees from
adjacent tunnels 54) and also rotationally offset from the
apertures 52 in the body 36. In this example, the tunnels 54 are
rotationally offset to allow for proper alignment of one of the
tunnels 54 with the opening 24 in the upper receiver 10 when the
upper receiver coupling 32 is secured to the upper receiver threads
18 at a desired torque or within a desired torque range.
[0031] The body 36 of FIGS. 7A-D further includes a flange or
shoulder 56 and openings 58, the purposes of which will be
described further blow.
[0032] FIG. 13 shows an alternate version of a body of an upper
receiver coupling. In FIG. 13, the body includes a split locking
collar including removable element 84 that secures to the rest of
the body using bolts 86. Although not shown in FIG. 13, the inner
surface of the split locking collar may be threaded to mate with
the threads 18 of the upper receiver 10. The alternate version of
the body shown in FIG. 13 also includes anti-rotation features 88.
The anti-rotation features 88 include stop surfaces 90. The
anti-rotation features are removably secured to the body using
bolts 92. When the upper receiver coupling is mounted to the upper
receiver and the anti-rotation features 88 are secured to the body
shown in FIG. 13, the stop surfaces 90 will interact with surfaces
on the upper receiver 10 (e.g. 94 in FIG. 3) to limit potential
rotation of the upper receiver coupling relative to the upper
receiver.
[0033] The anti-rotation features 88 shown in FIG. 13 are not
limited to use with just split locking collars like the one shown
in FIG. 13, and may also be used with, for example, the body 36
shown in FIG. 7. When used with the body 36 shown in FIG. 7, the
anti-rotation features 88 would be installed on the body after the
upper receiver coupling 32 is threaded onto the upper receiver
10.
[0034] FIGS. 8A-C show the sliding lock collar 42 of FIG. 6 in
further detail. The collar 42 has an opening extending through it
with an innermost internal diameter of sufficient dimension to
allow the collar 42 to fit over a portion of the body 36 in a
sliding fashion. The collar 42 may be slid in a translational
motion along the body 36 (e.g. straight along the body 36 without
rotation of the collar 42 relative to the body 36).
[0035] The opening of collar 42 includes a recessed area
terminating at shoulder 60 at one end of the collar 42. The recess
is configured to contain the resilient element 40 shown in FIG. 6,
with one end of the element 40 acting against shoulder 56 and the
other end of the element 40 acting against shoulder 60 such that
collar 42 is biased away from the shoulder 56 of body 36 towards
the other end of the body 36.
[0036] The opening of collar 42 also includes a second recess at
the other end of the collar 42. In this particular example, second
recess is formed by ramped surface 62. When the collar 42 is biased
away from the shoulder 56 of body 36, the ramped surface 62 acts on
locking elements 38 to cause those elements to protrude into the
opening 46 of body 36 (see FIG. 8D) in a locked position. When the
collar 42 is pulled back against the bias of resilient element 40,
the locking elements 38 are unlocked and can move out of the
opening 46 (see FIG. 8E).
[0037] FIGS. 9A-C show the face plate 44 of FIG. 6 in more detail.
The face plate includes a central opening 64 and tunnel portions 66
corresponding to the opening 46 and tunnels 54 of body 36. The
outer diameter of the face plate 44 is of sufficient size so that
when it is secured to the end of body 36 (e.g. using fasteners
passing through fastener openings 68 in face plate 44 and into
openings 58 in body 36), the face plate 44 limits the sliding
movement of collar 42 away from the shoulder 56 of body 36.
[0038] FIGS. 10A-C show the barrel coupling 34 of FIG. 5 in more
detail. The barrel coupling 34 includes an opening 70 extending
through it for receiving the barrel 12 of a firearm. In the
particular example shown, the opening 70 includes a recessed area
72 that partially or entirely receives a ridge on the barrel 12
such that the barrel coupling 34 can be slid over the barrel 12 and
receive the barrel ridge in the recessed area 72 such that the
reference surface 22 (e.g. a rear surface of the barrel ridge) is
flush with or slightly proud of the end of barrel coupling 34 (see
FIG. 11). Recessed area 72 can also be seen in FIGS. 5C-E.
Returning to FIGS. 10A-C, the barrel coupling 34 includes fastener
openings 74 for receiving fasteners to further secure the barrel
coupling in position on the barrel 12.
[0039] The barrel coupling 34 further includes several locking
element receivers 76 spaced apart from one another and configured
and located to receive portions of locking elements 38 during use.
In the particular example shown, the locking elements receivers 76
are depressions in the outer surface of the barrel coupling 34. In
the particular example shown, the spaced apart locking elements 38
and locking element receivers 76 help to resist rotation of the
movement or forces of the upper receiver coupling 32 relative to
the barrel coupling 34 when the components are locked together.
[0040] The barrel coupling 34 further includes threads 78 on a
portion of its outer surface. Threads 78 are not shown in FIG. 10
but are shown in FIG. 11. The pitch, thread angle, and other
characteristics (e.g. major diameter, minor diameter) of the
threads 78 of barrel coupling 34 are the same or substantially the
same as the pitch, thread angle, and other characteristics of the
threads 18 of upper receiver 10. Because these thread
characteristics are the same or substantially the same, barrel
and/or handguard nuts or other connectors useable with the upper
receiver threads 18 are also useable with the barrel coupling
threads 78, meaning that handguards and other components that were
usable with the upper receiver 10 can still be used with the
firearm after installation of the upper receiver coupling 32 and
barrel coupling 34 without requiring modification of those
components or additional adaptors.
[0041] FIG. 12 illustrates an example of a protective cap 82 for
protecting the end of gas tube 26 (or a piston) when the firearm is
disassembled.
Example Method of Installation
[0042] The following is one example of a method of installing the
quick-take down coupling shown in FIGS. 5-12.
[0043] The upper receiver coupling 32 may be installed onto the
upper receiver 10 by threading the upper receiver coupling 32 onto
the upper receiver threads 18 to a desired torque and such that one
of the tunnels 54 of the upper receiver coupling 32 is adequately
aligned with the opening 24 in upper receiver 10. Set screws or
other fasteners may be inserted into openings 50 in body 36 to
further secure the upper receiver coupling 32 to the upper receiver
threads 18.
[0044] The barrel coupling 34 may be installed onto the barrel 12
by sliding the coupling 34 onto the barrel until the barrel ridge
is partially or entirely received in recessed area 72, with the
reference surface 28 of the barrel ridge coplanar or just proud of
the end of barrel coupling 34 and barrel pin 30 adjacent or
proximate the barrel coupling 34. Set screws or other fasteners may
be inserted into openings 74 in coupling 34 to further secure it to
the barrel 12.
[0045] A handguard and/or barrel nut (e.g. 80 in FIG. 5A) may be
threaded onto the barrel coupling 34 (in some instances, this may
be done prior to securing the barrel coupling 34 to barrel 12). A
gas tube (e.g. 26 in FIG. 5A) or piston may be installed on barrel
12, with an end of the gas tube or piston extending through an
opening in the handguard / barrel nut 80, and a handguard (e.g. 14
in FIG. 5A) may be installed onto the handguard / barrel nut
80.
Example Method of Use
[0046] The following is one example of a method of using the
quick-take down coupling shown in FIGS. 5-12 after installation
onto a firearm.
[0047] Protective cap 82 may be removed from the end of gas tube 26
and barrel 12.
[0048] Sliding lock collar 42 may be slid using a translational
motion (e.g. non-rotational) back towards the upper receiver 10 to
an unlocked position that releases the locking elements 38 inside
of the upper receiver coupling 32.
[0049] While the sliding lock collar 42 is held at the unlocked
position, the barrel 12 may be inserted into the upper receiver 10.
The barrel 12 is inserted until the barrel reference surface 28
contacts the upper receiver contact surface 22, with the barrel pin
30 seated in notch 20. During insertion of the barrel, gas tube 26
(or a piston) is also inserted through one of the tunnels 54 in the
upper receiver coupling 32 and into opening 24 in the upper
receiver 10. Once inserted, the locking element receivers 76 of the
barrel coupling 34 are aligned with the locking elements 38 of the
upper receiver coupling 32.
[0050] Once inserted, the sliding lock collar 42 is released such
that resilient element 40 forces the sliding lock collar 42 back to
a locked position, causing the locking elements 38 to engage the
locking element receivers 76, securing the barrel 12 to the upper
receiver 10.
[0051] The barrel 12 may be removed from the upper receiver 10
using the same procedure in reverse.
[0052] The foregoing description is by way of example only, and
does not limit in any way the scope of the present invention, which
is set forth in the following claims. Additions, deletions,
substitutions, and other modifications to the systems and methods
described above may be made without departing from the scope or
spirit of the present invention.
* * * * *